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EP2249179A3 - Distance measuring assembly and method - Google Patents

Distance measuring assembly and method Download PDF

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Publication number
EP2249179A3
EP2249179A3 EP10004235A EP10004235A EP2249179A3 EP 2249179 A3 EP2249179 A3 EP 2249179A3 EP 10004235 A EP10004235 A EP 10004235A EP 10004235 A EP10004235 A EP 10004235A EP 2249179 A3 EP2249179 A3 EP 2249179A3
Authority
EP
European Patent Office
Prior art keywords
ring
transmitter
signal
data
clock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10004235A
Other languages
German (de)
French (fr)
Other versions
EP2249179A2 (en
Inventor
Reinhold Prof. Noé
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus DS GmbH
Original Assignee
Astrium GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Astrium GmbH filed Critical Astrium GmbH
Publication of EP2249179A2 publication Critical patent/EP2249179A2/en
Publication of EP2249179A3 publication Critical patent/EP2249179A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

Bei dieser Anordnung und dem zugehörigen Verfahren für eine vorzugsweise optische Entfernungsmessung mit digital modulierten Signalen wird ein Empfangstaktsignal CL2 mit einer Takt-und-Datenrückgewinnung CDR aus dem Empfangssignal RXS wiedergewonnen und als Sendetaktsignal CL1 des modulierten Sendesignals TXS eingesetzt. Auf diese Weise wird eine feste Zahl von Datenpulsen im Ring Sender TX - Messpfad P1 - Empfänger RX - Sender TX untergebracht. Durch einen fehlertoleranten Vergleich zwischen gesendeten und empfangenen Daten kann man bestimmen, wieviele Datenpulse der Ring enthält. Mit einem Zähler wird die Schleifentaktfrequenz CLFL oder Symboldauer CLTL im Ring gemessen. Aus beiden berechnet man die Entfernung D1, D2. Laufzeitänderungen von Optik und Elektronik kann man durch Umschalten zwischen zwei Messpfaden P1, P2 herauskalibrieren.

Figure imgaf001
In this arrangement and the associated method for a preferably optical distance measurement with digitally modulated signals, a receive clock signal CL2 with a clock-and-data recovery CDR is retrieved from the received signal RXS and used as a transmit clock signal CL1 of the modulated transmit signal TXS. In this way a fixed number of data pulses are accommodated in the ring transmitter TX - measuring path P1 - receiver RX - transmitter TX. By means of a fault-tolerant comparison between transmitted and received data, one can determine how many data pulses the ring contains. A counter is used to measure the loop clock frequency CLFL or symbol duration CLTL in the ring. From both, one calculates the distance D1, D2. Travel time changes of optics and electronics can be calibrated out by switching between two measuring paths P1, P2.
Figure imgaf001
EP10004235A 2009-04-28 2010-04-21 Distance measuring assembly and method Withdrawn EP2249179A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910018926 DE102009018926A1 (en) 2009-04-28 2009-04-28 Arrangement and method for a distance measurement

Publications (2)

Publication Number Publication Date
EP2249179A2 EP2249179A2 (en) 2010-11-10
EP2249179A3 true EP2249179A3 (en) 2011-06-15

Family

ID=42557300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10004235A Withdrawn EP2249179A3 (en) 2009-04-28 2010-04-21 Distance measuring assembly and method

Country Status (2)

Country Link
EP (1) EP2249179A3 (en)
DE (1) DE102009018926A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471858A (en) * 1968-10-30 1969-10-07 Nasa Dynamic doppler simulator
US4694297A (en) * 1984-02-27 1987-09-15 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Remote identification device
US5764161A (en) * 1990-08-06 1998-06-09 Schier; J. Alan Sensing apparatus using frequency changes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471858A (en) * 1968-10-30 1969-10-07 Nasa Dynamic doppler simulator
US4694297A (en) * 1984-02-27 1987-09-15 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Remote identification device
US5764161A (en) * 1990-08-06 1998-06-09 Schier; J. Alan Sensing apparatus using frequency changes

Also Published As

Publication number Publication date
DE102009018926A1 (en) 2010-11-11
EP2249179A2 (en) 2010-11-10

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